Mechanical Engineering Written Exam Questions (GTCL-2010)

Mechanical Engineering Written Exam Questions (GTCL-2010)

Company- Gas Transmission Company Limited (GTCL)

Post- Assistant Engineer-Mechanical

Year- 2010

    ➦ Explain regeneration of gas turbine with the help of schematic diagram.

    ➦ Write 3 types of gear. Which are the typical uses of worm gear?

    ➦ Write down the comparison between  4-strokes & 2-strokes engine.

    ➦ Differentiate flow in pipe & open channel flow.

    ➦ Draw the P-V & T-S diagram of Joule-Brayton cycle.

    ➦ Define Positive Displacement pump.

    ➦ A eight cylinder I.C Engine has bore X stroke = 75 m X 70 m. Compression ratio =10:1, calculate the volume of combustion chamber & specified the engine.

    ➦ A pump has suction head =0.4 m, delivery head =14.6 m, Discharge =10 m³/h. To drive the pump you have to select a motor which has efficiency 90%. Calculate the power of the motor.

    ➦ A vapor compression system has 10 ton capacity, COP=3, what the power required to KW?

    ➦ A cantilever beam has length 1 m, 15N load is applied in its top. If EI=10 Nm², What is the maximum deflection?

    ➦ A thin cylinder has inner diameter = 50 mm, thickness = 2.5 mm, Maximum allowable normal stress = 150 MPa. What will be the internal pressure?

    ➦ Define Reynolds Number.

    ➦ Define Mach Number.

    ➦ Define Nusselts  Number.

    ➦ Define Prandlts  Number.

    ➦ Write the Euler's equation for both end clamped. A Euler column of both ends clamped which unsupported length= 1.0 m, stiffness EI=50 Nm². What is the bulking load?

    ➦ A spring stiffness 50 KN/m, mass = 3 Kg is hang on spring. Write down the equation of the state, what's the frequency of vibration.